/*
 * Copyright 2012-2017 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      https://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.springframework.integration.smb.session;

import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.nio.MappedByteBuffer;
import java.nio.channels.FileChannel;

/**
 * @author Markus Spann
 * @since 1.0
 */
public final class SmbUtils {

	private SmbUtils() {
	}

	/**
	 * Read the specified file into a byte array.
	 * @param _file file
	 * @return byte array of file contents
	 * @throws IOException the IO exception
	 */
	public static byte[] readFile(File _file) throws IOException {
		FileInputStream stream = new FileInputStream(_file);
		try {
			FileChannel fc = stream.getChannel();
			MappedByteBuffer bb = fc.map(FileChannel.MapMode.READ_ONLY, 0, fc.size());
			return bb.array();

			/* Instead of using default, pass in a decoder. */
			// return Charset.defaultCharset().decode(bb).toString();

		}
		finally {
			stream.close();
		}
	}

}
